$-\left\{2-\left[-4+4\left(2+10\right)\right]\right\}$

$10-\left(-2\right)+\left(5\right)+\left(-10\right)-\left(-3-1\right)-\left(15\right)-\left(-6+2\right)-\left(4\right)+\left(-15\right)$

$\frac{dr}{dq}=\frac{1000}{\sqrt{1009}}$

$\int\frac{1}{c\left(c^2+1\right)}dx$

$3y^2+5y-2$

$\frac{12x-y}{-2x+2y}$

$x+18=-2$